Machia was formed from Vermillion snakes "hand-selected from the most genetically superior Serpentine" by Krux as part of his plan to take over Ninjago after reuniting with his brother Acronix. She proved the most aggressive of her compatriots, and quickly established her authority over companions Commander Blunck and Commander Raggmunk. This would show through as she took over the operation to steal metal from across Ninjago for their masters' plans, though she would later be called from the front to help "motivate" Cyrus Borg in his role as captive laborer. When the second of the four Time Blades returned to Ninjago, Machia reluctantly ordered Blunck and Raggmunk's forces to retrieve it, only for them to report their failure under an absurd pretense.
The first-and thus far only-set in which Machia was released featured her with two leg options: standard minifigure legs and a snake tail. The latter did not appear in the Hands of Time season in which Machia made her debut.